摘要:
An improved synthesis of a highly potent HIV reverse transcription inhibitor is disclosed, involving an acetylide and a trifluoromethyl ketone which produces a chiral product in the presence of a chiral amino alcohol.
摘要:
A process is described for the preparation of an optically active carboxylic acid or ester derivative thereof from a ketene and an optically active .alpha.-hydroxyester or an .alpha.-hydroxy amide.
摘要:
The present invention is directed to a compound represented by the structural formula: ##STR1## wherein Z-- represents a negatively charged counterion.
摘要:
An asymmetric synthesis of (S)-(-)-6-chloro-4-cyclopropyl-3,4-dihydro-4-[(2-pyridyl)ethynyl]-2(1H)-quinazolinone comprises the chiral addition of 2-pyridylacetylide to N.sup.1 -protected 6-chloro-4-cyclopropyl-2-quinazolinone followed by removal of the protecting group.
摘要:
The present invention is directed to a process of making 2-aryl carbapenems of formula 1 from a compound of formula A. ##STR1## wherein compound A is reacted with a silyl protected boronic acid compound of the formula B: ##STR2## and wherein Ar is selected from the group consisting of: ##STR3##
摘要:
A chiral resolution process is described for the purification of a substituted chiral quinazoline, by salt formation with a resolving agent, followed by crystallization.
摘要:
Described is a process for converting an alcohol to an azide with S.sub.N 2 inversion using a phosphoryl azide, e.g. diphenylphosphoryl azide (DPPA). Good yields of azide in high enantiomeric excess can be achieved specifically for benzylic alcohols and alpha-hydroxy alkyl esters. The process is carried at preferably room temperature in an inert dry aprotic solvent, e.g. toluene, and in the presence of a proton acceptor, e.g. 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) to afford high yields of high enantiomeric purities.
摘要:
An efficient method for the preparation of a compound of (-)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one, also known as DMP-266, a reverse transcriptase inhibitor is achieved using a cyclization reaction of the amino alcohol intermediate with an alkyl or aryl chloroformate and a base.
摘要:
A new heterocycle, 5,11-diazatetracyclo-[6.2.2.0.sup.2,7.0.sup.4,9 ]dodecane, is prepared by heating an endo-diazatricyclo[6.2.2.0.sup.2,7 ]dodec-11-ene substituted in the 7 and 11 positions with electron withdrawing groups. 2,9-Bis-phenylacetyl derivatives of the new heterocycle and closely related derivatives are potent analgesic agents.
摘要:
A new heterocycle, 5,11-diazatetracyclo[6.2.2.0.sup.2,7.0.sup.4.9 ]dodecane, is prepared by heating an endo-diazatricyclo[6.2.2.0.sup.2,7 ]dodec-11-ene substituted in the 7 and 11 positions with electron withdrawing groups. 2,9-Bis-phenylacetyl derivatives of the new heterocycle and closely related derivatives are potent analgesic agents.